Yifan Hong | 21e3b6e | 2021-01-19 12:34:37 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2021 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | #include "utils.h" |
| 17 | |
| 18 | #include <sstream> |
| 19 | |
| 20 | #include "parse_string.h" |
| 21 | |
| 22 | namespace android::vintf::details { |
| 23 | |
| 24 | bool canConvertToFqInstance(const std::string& package, const Version& version, |
| 25 | const std::string& interface, const std::string& instance, |
| 26 | HalFormat format, std::string* appendedError) { |
| 27 | if (FqInstance::from(package, version.majorVer, version.minorVer, interface, instance) |
| 28 | .has_value()) { |
| 29 | return true; |
| 30 | } |
| 31 | if (appendedError == nullptr) { |
| 32 | return false; |
| 33 | } |
| 34 | |
| 35 | // Attempt to construct a good error message. |
| 36 | std::stringstream ss; |
| 37 | ss << "Invalid instance: '"; |
| 38 | if (format == HalFormat::AIDL) { |
| 39 | ss << toAidlFqnameString(package, interface, instance) << " (@" << version.minorVer << ")"; |
| 40 | } else { |
| 41 | ss << toFQNameString(package, version, interface, instance); |
| 42 | } |
| 43 | ss << "'. "; |
| 44 | |
| 45 | // Attempt to guess the source of error. |
| 46 | bool foundError = false; |
| 47 | if (!FqInstance::from(package).has_value()) { |
| 48 | ss << "Package '" << package |
| 49 | << "' should have the format [a-zA-Z_][a-zA-Z0-9_]*(\\.[a-zA-Z_][a-zA-Z0-9_]*)*"; |
| 50 | foundError = true; |
| 51 | } |
| 52 | |
| 53 | std::optional<FqInstance> convertedInterface = FqInstance::from(interface); |
| 54 | if (!convertedInterface.has_value() || !convertedInterface->hasInterface()) { |
| 55 | ss << "Interface '" << interface << "' should have the format I[a-zA-Z0-9_]*"; |
| 56 | foundError = true; |
| 57 | } |
| 58 | |
| 59 | if (!foundError) { |
| 60 | ss << "Unknown error."; |
| 61 | } |
| 62 | ss << "\n"; |
| 63 | |
| 64 | *appendedError += ss.str(); |
| 65 | return false; |
| 66 | } |
| 67 | |
| 68 | } // namespace android::vintf::details |